AOpen MX3L User Manual
MX3L
User's Guide
Printed in Taiwan
PART NO.: 49.88101.081
DOC. NO.: MX3L-1-E9901A
MX3L
Motherboard
User's Guide
Document Number : MX3L-1-E9901A
Model and revision : For MX3L rev 1.xx
Manual version : English, rev A
Release Date : Jan 18, 1999
More help for latest information:
Taiwan http://www.aopen.com.tw
USA http://www.aopenusa.com
Europe http://www.aopen.nl
Copyright
Copyright 1999 by this company. All rights reserved. No part of this
publication may be reproduced, transmitted, transcribed, stored in a retrieval
system, or translated into any language or computer language, in any form or
by any means, electronic, mechanical, magnetic, optical, manual or otherwise,
without the prior written permission of this company.
ii
Disclaimer
This company makes no representations or warranties, either expressed or
implied, with respect to the contents hereof and specifically disclaims any
warranties, merchantability or fitness for any particular purpose. Any software
described in this manual is sold or licensed "as is". Should the programs
prove defective following their purchase, the buyer (and not this company, its
distributor, or its dealer) assumes the entire cost of all necessary servicing,
repair, and any incidental or consequential damages resulting from any defect
in the software. Further, this company reserves the right to revise this
publication and to make changes from time to time in the contents hereof
without obligation to notify any person of such revision or changes.
Intel and Pentium are registered trademarks of Intel Corporation.
XT/AT is a registered trademark of International Business Machines Corporation.
AMI is a registered trademark of American Megatrends Inc.
AWARD is a registered trademark of Award Software Inc.
Other brand and product names are trademarks and/or registered trademarks of their
respective holders.
iii
FCC Class B Radio Frequency
Declaration of Conformity
This equipment has been tested and found to comply with the limits for a Class B
Subassembly -CPU Board device, pursuant to Part 15 of FCC Rules. Operation is
subject to the following two conditions: 1. This device may not cause harmful
interference, and 2. This device must accept any interference received, including
interference that may cause undesired operation.
Equipment Classification : FCC Class B Subassembly - CPU Board
Type of Product : Intel Celeron PPGA Micro ATX Motherboard
Chipset(s) : Intel 82440LX
MX3L
Test To Comply
With FCC Standards
FOR HOME OR OFFICE USE
The limits of FCC Part 15 Class B are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses, and
can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there
is no guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
1. Reorient or relocate the receiving antenna.
2. Increase the separation between the equipment and receiver.
3. Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
4. Consult the dealer or an experienced radio/television technician for help.
Notice 1:
The changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment.
Notice 2:
Shielded interface cables, if any, must be used in order to comply with emission limits.
iv
Organization
Chapter 1, Overview, covers the introduction and specifications of the system
board and special features.
Chapter 2, Hardware Installation, describes hardware jumpers, connectors and
memory configuration. There are user friendly drawings to locate jumper and
connector.
Chapter 3, AWARD BIOS, explains the system BIOS and tells how to configure
the system by setting the BIOS parameters.
v
Conventions
The following conventions are used in this manual:
Text entered by user,
default settings,
recommended selections
<Enter>, <Tab>,<Ctl>, <Alt>,
<Ins>, <Del>, etc
Represent text input by the user,
default settings and recommended
selections
Represent the actual keys that you
have to press on the keyboard.
Note:
Gives bits and pieces of additional
information related to the current topic.
Warning:
Alerts you to any damage that might
result from doing or not doing specific
actions.
Caution:
Suggests precautionary measures to
avoid potential hardware or software
problems.
Important:
Reminds you to take specific action
relevant to the accomplishment of the
procedure at hand.
Tip:
Tells how to accomplish a procedure
with minimum steps through little
shortcuts.
vi
CONTENTS
CHAPTER 1 OVERVIEW
1.1
SPECIFICATIONS ....................................................................................... 4
1.2
APM SUSPEND TO HARD DRIVE ..............................................................5
1.3
ZERO VOLTAGE WAKE ON MODEM ......................................................... 8
1.4
SYSTEM VOLTAGE MONITORING............................................................ 10
1.5
FAN MONITORING .................................................................................. 10
1.6
CPU THERMAL PROTECTION ................................................................. 11
1.7
BATTERY-LESS DESIGN.......................................................................... 11
CHAPTER 2 HARDWARE INSTALLATION ...........................................1
2.1
JUMPER AND CONNECTOR LOCATIONS .................................................... 2
2.2
JUMPERS ..................................................................................................4
2.2.1 Selecting the CPU Frequency ..........................................................4
2.2.2 Setting the CPU Voltage ..................................................................5
2.2.3 Clearing the CMOS..........................................................................5
2.2.4 Onboard Audio.................................................................................6
2.2.5 KB/MS Wakeup ................................................................................6
2.3
CONNECTORS ...........................................................................................7
2.3.1 Power Cable.....................................................................................7
2.3.3 Fan……… ........................................................................................7
2.3.4 PS/2 Mouse ......................................................................................8
2.3.5 Keyboard.......................................................................................... 8
2.3.6 Serial Devices (COM1/COM2) ........................................................8
2.3.7 Printer…...........................................................................................9
2.3.8 USB Device ......................................................................................9
2.3.9 Floppy Drive ..................................................................................10
2.3.10 IDE Hard Disk and CD ROM .....................................................10
2.3.11 Panel Connector ..........................................................................11
2.3.12 IrDA Connector............................................................................12
2.3.13 Wake On Modem Connector ........................................................13
2.3.14 Wake On LAN Connector.............................................................13
2.3.15 CD Audio Connector....................................................................14
2.3.16 Mono In/Mic Out Connector........................................................14
2.4
CONFIGURING THE SYSTEM MEMORY ....................................................15
2.5
ONBOARD AUDIO................................................................................... 18
vii
2.5.1 Setting Up in Windows 95/98.........................................................20
2.5.2 Setting Up in NT4.0........................................................................21
CHAPTER 3 AWARD BIOS ........................................................................1
3.1
ENTERING THE AWARD BIOS SETUP MENU ............................................2
3.2
STANDARD CMOS SETUP ........................................................................3
3.3
BIOS FEATURES SETUP ........................................................................... 6
3.4
CHIPSET FEATURES SETUP ..................................................................... 10
3.5
POWER MANAGEM ENT SETUP ................................................................18
3.6
PNP/PCI CONFIGURATION SETUP.......................................................... 25
3.7
LOAD SETUP DEFAULTS.........................................................................30
3.8
LOAD TURBO DEFAULTS........................................................................ 30
3.9
INTEGRATED PERIPHERALS .................................................................... 31
3.10
PASSWORD SETTING.............................................................................38
3.11
IDE HDD AUTO DETECTION ............................................................... 38
3.12
SAVE & EXIT SETUP.............................................................................38
3.13
LOAD EEPROM DEFAULT................................................................... 39
3.14
SAVE EEPROM DEFAULT ...................................................................39
3.15
EXIT WITHOUT SAVING ........................................................................39
3.16
NCR SCSI BIOS AND DRIVERS........................................................... 39
3.17
BIOS FLASH UTILITY...........................................................................40
viii
Chapter 1
Overview
MX3L is a new generation Socket 370 based system board that utilizes Intel
82440LX AGPset on Micro ATX PCI/ISA platform. This AGPset is designed
for Celeron PPGA CPU, and supports new architectures such as high speed
AGP graphic port, SDRAM, Ultra DMA/33, Bus master IDE and USB port. It
has three Dual in-line Memory Module (DIMM) that allow to install EDO and
SDRAM and expand up to a maximum of 768MB. Also, MX3L uses 2M bit
Flash ROM BIOS to reserve for future new functions.
Not only above features, MX3L also implements a lot of special features as the
following.
Jumper-less Design VID signal and SMbus clock generator provide CPU
voltage auto-detection and allows user to set CPU frequency through CMOS
setup, no jumper or switch is needed. The correct CPU information is saved
into EEPROM, with these technologies, the disadvantages of Pentium base
jumper-less design are eliminated. There will be no worry of wrong CPU
voltage detection and no need to re-open the housing if CMOS battery loss.
The only jumper left is to clear CMOS, which is a safety hook if you forget the
password.
Battery-less MX3L implements EEPROM and special circuit (patent applied)
that allows you to save your current CPU and CMOS Setup configurations
without the need of battery. The RTC (real time clock) can also keep running
as long as power cord is plugged. If you lose your CMOS data by accident, you
can just reload the CMOS configurations from EEPROM and the system will
recover as usual.
APM Suspend To Hard Drive "Immediately" turns on system and goes back
to the original screen before power down. You can resume your original work
directly from hard disk without go through the Win95 booting process and run
your application again. Suspend to Hard Drive saves your current work
(system status, memory image) into hard disk. Note that you have to use
VESA compatible PCI VGA, Sound Blaster compatible sound card with APM
driver, for Suspend to Hard Drive to work properly.
1-1
Overview
Zero Voltage Wake on Modem In conjunction with ATX soft power On/Off, it
is possible to have system totally power off and wakeup to automatically
answer a phone call such as answering machine or to send/receive fax. The
most important break through is not only external box modem but also internal
modem card can be used to support Wake On Modem. The MX3L and MP56
internal modem card implement special circuit (patent applied) to make sure
the modem card work properly without any power.
Wake on LAN This feature is very similar as Wake On Modem, but it is
through local area network. To use Wake On LAN function, you must have a
network card that supports this feature and also need to install a network
management software.
Wake on RTC Timer The Wake Up Timer is more like an alarm, which
wakes up and power on your system at a pre-defined time for specific
application. It can be set to wake up everyday or on specific date within a
month. The date/time accuracy is second.
Wake on Keyboard This feature allows you power on your system by clicking
the hot key that you specified. Besides, you also may disable the function of
power button and let the system can only be powered on through the preset
keys (like a password).
Wake on Mouse This function allows you wake up the system by clicking
mouse button twice successively.
AC Power Auto Recovery A traditional ATX system should remain at power
off stage when AC power resumes from power failure. This design is
inconvenient for a network server or workstation, without an UPS, that needs
to keep power-on. This motherboard implements an AC Power Auto Recovery
function to solve this problem. In BIOS Setup setting the item to Enabled lets
the system can automatically power-on after AC power resumes.
High Efficient Synchronous Switching Regulator Most of the current
switching designs are Asynchronous mode, which from the technical point of
view, still consumes very high power as well as heat. MX3L implements high
efficient synchronous switching design that the temperature of MOS FET is far
less than Schottky diode of asynchronous design.
Over Current Protection The Over Current Protection was very popular
implemented on the Baby AT or ATX 3.3V/5V/12V switching power supply.
However, the new generation Celeron PPGA CPU uses different voltage that
have regulator to transfer 5V to CPU voltage (for example, 2.0V), and make 5V
over current protection useless. MX3L with switching regulator onboard
support CPU over current protection, in conjunction with 3.3V/5V/12V power
supply provide the full line over current protection.
CPU and Housing Fan Monitoring MX3L has one more "fan monitoring"
function to prevent system overheat. There are two fan connectors, one is for
CPU and the other can be an extra housing fan. The system will report and
1-2
Overview
alarm fan malfunction though utility software such as Hardware Monitor utility
(Small Icon for Hardware Monitoring).
CPU Thermal Protection MX3L has a special thermal detection circuit to have
warning through application software when the temperature is higher than a
predefined value.
System Voltage Monitoring Further more, MX3L implements a voltage
monitoring system, As you turn on your system, this smart design will continue
to monitor your system working voltage. If any of the system voltage is over
the component's standard. There will be alarm though utility software such as
Hardware Monitor utility (Small Icon for Hardware Monitoring) for a warning to
user.
Full-range CPU core voltage This motherboard supports the CPU core
voltage from 1.3V to 2.05V, that can be applied to various CPU type in future.
Resetable Fuse This motherboard implements resetable fuses to prevent any
accidental short circuit caused by keyboard or USB devices hot plug.
FCC DoC certificate MX3L has passed FCC DoC test. The radiation is very
low, you can use any kind of housing.
Powerful Utility Software AOpen Bonus Pack bundled CD contains many
useful utilities, such as Norton Antivirus, AOchip, Hardware Monitoring utility,
and Suspend to Hard Drive utility.
Note: This motherboard is battery-less, that means the RTC
(real time clock) can keep running without battery as long as
the power cord is plugged. But in case of power failure or the
power cord unplugged, you need to reset date and time from
"Standard CMOS Setup" section of BIOS Setup. For more
information, please see "Chapter 3 BIOS Setup".
1-3
Overview
1.1 Specifications
Form Factor
Board Size
CPU
System Memory
Chipset
Expansion Slots
Serial Port
Parallel Port
Floppy Interface
IDE Interface
USB Interface
PS/2 Mouse
Keyboard
RTC and Battery
BIOS
Micro ATX
244 mm x 220 mm
Celeron PPGA
168-pin DIMM x3, maximum 768MB EDO or 384
SDRAM.
Intel 82440LX AGPset
ISA x1, PCI x3 and AGP x1
Two serial ports UART 16C550 compatible, and the
3rd UART for IR function.
One parallel port supports standard parallel port (SPP),
enhanced parallel port (EPP) or extended capabilities
port (ECP).
Floppy interface supports 3.5 inches drives with
720KB, 1.44MB or 2.88MB format or 5.25 inches
drives with 360KB, 1.2MB format
Dual-channel IDE interface support maximum 4 IDE
hard disks or CDROM, mode 4 , bus master hard disk
drives and Ultra DMA/33 mode hard drives are also
supported.
Two USB ports supported by USB bracket, the BIOS
also supports USB driver to simulate legacy keyboard.
Mini-Din PS/2 mouse connector onboard.
Mini-Din PS/2 keyboard connector onboard.
RTC within Intel PIIX4E chipset. Lithium (CR-2032)
battery is an option, no battery is needed if power cord
is plugged.
AWARD Plug-and-Play, 2M bit Flash ROM BIOS.
1-4
Overview
1.2 APM Suspend to Hard Drive
Suspend to Hard Drive saves your current work (system status, memory and
screen image) into hard disk, and then the system can be totally power off.
Next time, when power is on, you can resume your original work directly from
hard disk within few second without go through the Win95 booting process and
run your application again. If your memory is 16MB, normally, you need to
reserve at least 16MB HDD space to save your memory image. Note that you
have to use VESA compatible PCI VGA (AOpen PV70/PT70), Sound Blaster
compatible sound card and sound driver that supports APM (AOpen
AW32/AW35) for Suspend to Hard Drive to work properly. Of course, we
recommend to use AOpen products for best compatibility.
To use Suspend to Hard Drive:
1. Go into BIOS setup, Power Management Æ Suspend Mode Option, select
"Suspend to Disk".
2. Go into BIOS setup, PNP/PCI Configuration Æ PnP OS Installed, select
"No". This can give BIOS the capability to allocate system resources for
Suspend to Hard Drive.
3. Boot up your system into DOS command prompt. If you are Win'95 user,
Please restart your Windows 95 under "Command Prompt" by pressing
"F8" while system shows "Windows 95 Starting ...". Choose "Safe Mode
Command Prompt Only" from selection so that system will start in DOS
command prompt.
4. Copy AOZVHDD.EXE to the root directory of your C: drive.
5. Option 1: Use /file switch (applied to FAT16 file system):
Please use following command to create a hidden file in the root directory
of your hard disk for Suspend to Hard Drive to save the system status and
memory image.
C:>AOZVHDD /c /file
Please make sure that you have enough continuous HDD space for
creating this hidden file. For example, if you have 32MB of system memory
and 4MB of VGA memory, you need at least 36MB (32MB + 4MB) of
continuous HDD space. If AOZVHDD failed to allocate the HDD space, you
may run "DEFRAG" Utility or "Disk Defragmenter" which come with MSDOS or Win'95 to free HDD space.
1-5
Overview
Option2: Use /partition switch (applied to FAT16/FAT32 file system):
To create a separate partition for Suspend to Hard Drive, please make sure
you have reserved a free partition. We suggest you reserve the free
partition which space is appropriate for your future memory expansion. For
example, if you have 32MB of system memory and 4MB of VGA memory
currently, but you plan to upgrade system memory to 64MB in the near
future, then you may reserve a 68MB (64MB+4MB) space by using a disk
utility (such as fdisk). Next, use following command to create a suspend
partition:
C:>AOZVHDD /c /partition
If there is no extra free partition and you don't want your data lost, please
do not use this partition method.
6. After creating above partition or hidden file, please reboot your system.
7. Push suspend switch (momentary mode) or use Win95 Suspend icon to
force system goes into Suspend to Hard Drive mode and then turn system
power off by power switch of your power supply.
8. Next time when you turn on your system, it will resume to your original work
automatically.
Warning: Note that Intel Bus Master and Ultra
DMA/33 IDE driver are not fully compatible with
Suspend to Hard Drive function, installing these
drivers may cause the system unstable. Under this
situation, please uninstall the drivers.
1-6
Warning: This function does not support SCSI hard
disks.
Tip: The following VGA cards have been tested &
recognized as VESA compatible VGA device.
AOpen PV90 (Trident 9680)
AOpen PT60 (S3 Virge/BIOS R1.00-01)
AOpen PV60 (S3 Tiro64V+)
AOpen PT70 (S3 Virge/DX)
ProLink Trident GD-5440
ProLink Cirrus GD-5430
ProLink Cirrus GD-5446
ATI Mach 64 GX
ATI 3D RAGE II
Diamond Stealth64D (S3 868)
Diamond Stealth64V (S3 968)
KuoWei ET-6000
ATI 3D RAGE PRO 2x (AGP)
PLOTECH 3D IMAGE 9850 (AGP)
CARDEX S3 Virge/GX (AGP)
Tip: The following sound cards have been tested OK
for Suspend to Hard Drive.
Creative Sound Blaster PCI 64
Creative Ensoniq
Creative Sound Blaster PCI 128
Videologic Sonic Storm
Overview
If your sound card can not work after resume from
Suspend to Hard Drive, check your sound card
vendor see if there is driver to support APM, and
install it again.
Note: The USB function has not been tested for
Suspend to Hard Drive. If you find any unstable
problem, please go into BIOS, Integrated Peripherals
Æ
USB Legacy Support. Disable the USB Legacy
function.
1-7
Overview
p
(
)
p
1.3 Zero Voltage Wake On Modem
The Wake On Modem discussed here is to wakeup from true power off
(identified by fan of power supply is off), This motherboard still supports
traditional green PC suspend mode but it is not discussed here.
With the help ATX soft power On/Off, it is possible to have system totally
power off (The traditional suspend mode of power management function does
not really turn off the system power supply), and wakeup to automatically
answer a phone call such as answering machine or to send/receive fax. You
may identify the true power off by checking fan of your power supply. Both
external box modem and internal modem card can be used to support Modem
Wake Up, but if you use external modem, you have to keep the box modem
always power-on. AOpen MX3L and internal modem card implement special
circuit (patent applied) and make sure the modem card works properly without
any power. We recommend you choose AOpen modem card (MP56) for Wake
On Modem applications.
TEL Line
COM port
External Box Modem
External Modem WakeU
TEL Line
Internal Modem Card WakeU
1-8
such as MP56
Overview
For Internal Modem Card (AOpen MP56):
1. Go into BIOS setup , Power Management Æ 0V Wake On Modem, select
Enable.
2. Setup your application, put into Windows 95 StartUp or use Suspend to
Hard Drive function.
3. Turn system power off by soft power switch.
4. Connect 4-pin Modem Ring-On cable from MP56 RING connector to MX3L
WOM connector.
5. Connect telephone line to MP56. You are now ready to use Modem RingOn.
For External Box Modem:
1. Go into BIOS setup , Power Management Æ Modem Wake Up, select
Enable.
2. Setup your application, put into Windows 95 StartUp or use Suspend to
Hard Drive function.
3. Turn system power off by soft power switch.
4. Connect RS232 cable of external box Modem to COM1 or COM2.
5. Connect telephone line to external box Modem. Turn on Modem power
(you must keep Modem power always on). You are now ready to use
Modem Ring
Tip: External modem wake up signal is detected through
COM1 or COM2. Internal modem card wake up signal is
detected through cable from connector RING (on modem
card) to WOM (on mainboard).
Tip: You can combine Suspend to Hard Drive, 0V Wake
On Modem and the software Acephone for the best
solution of answering machine or to send/receive fax.
Note: If you use external modem, the power of external
modem must be kept on to receive signal from telephone
line. Internal modem card has no such limitation.
1-9
Overview
1.4 System Voltage Monitoring
This motherboard implements a voltage monitoring system. As you turn on
your system, this smart design will continue to monitor your system working
voltage. If any of the system voltage is over the component's standard. There
will be alarm through application software such as Hardware Monitor utility for
a warning to user. System voltage monitoring function monitors CPU core
voltage. It is automatically implemented by BIOS and Hardware Monitor utility
(the file name is like aohw100.exe, where 100 means the version number), no
hardware installation is needed.
1.5 Fan Monitoring
There are three fan connectors, two is for CPU, the other can be connected to
a housing fan. The fan monitoring function is implemented by connecting fan
to 3-pin fan connector CPUFAN1 or FAN and installing Hardware Monitor
utility.
Note: You need a 3-pin fan that supports SENSE
signal for fan monitoring function to work
properly.
1-10
Overview
1.6 CPU Thermal Protection
This mainboard implements special thermal protection circuits. When
temperature is higher than a predefined value, there will be a warning through
application software such as Hardware Monitor utility to notify user. It is
automatically implemented by BIOS and Hardware Monitor utility, no hardware
installation is needed.
1.7 Battery-less Design
To preserve the earth, AOpen MX3L implements the battery-less motherboard
design. There is no need to have battery for RTC (real time clock) and CMOS
Setup as long as ATX power cable is plugged. In case of the AC power is
shutdown or power cord is removed by accident, the CMOS Setup and system
configuration can be restored from EEPROM, only the system clock needed to
be re-set to current date/time.
For the convenience of end user, MX3L still shipped with one Lithium (CR-
2032) battery. If you prefer to use battery, you can still insert it into battery
socket. The RTC will still keep running even power cord is removed.
1-11
Chapter 2
Hardware Installation
This chapter gives you a step-by-step procedure on how to install your system.
Follow each section accordingly.
Caution: Electrostatic discharge (ESD) can
damage your processor, disk drives,
expansion boards, and other components.
Always observe the following precautions
before you install a system component.
1. Do not remove a component from its
protective packaging until you are ready
to install it.
2. Wear a wrist ground strap and attach it to
a metal part of the system unit before
handling a component. If a wrist strap is
not available, maintain contact with the
system unit throughout any procedure
requiring ESD protection.
2-1
Hardware Installation
2.1 Jumper and Connector Locations
The following figure shows the locations of the jumpers and connectors on the
system board:
CD-IN
JP12
I
P
S
C
A
I
3
FAN
P
C
2
WOL
I
MODEM-CN
P
C
I
1
COM2
IrDA
FDC
A
G
P
PRINTER
COM1
USB
CPUFAN2
DIMM3
DIMM2
DIMM1
KB2
PS/2 MS
JP28
CPU FAN1
PANEL
2-2
BIOS
WOM
IDE2
IDE1
JP14
Hardware Installation
Jumpers:
JP12: Enable/Disable Onboard Audio
JP14: Clear CMOS
JP28: Enable/Disable KB/MS Wake Up
Connectors:
PS2: PS/2 mouse connector
KB: PS/2 keyboard connector
COM1: COM1 connector
COM2: COM2 connector
PRINTER: Printer connector
PWR2: ATX power connector
USB: USB connector
FDC: Floppy drive connector
IDE1: IDE1 primary channel
IDE2: IDE2 secondary channel
CPUFAN1: CPU fan connector
CDUFAN2: CPU fan connector
FAN: Housing Fan Connector
IrDA: IrDA (Infrared) connector
PANEL: Front panel (Multifunction) connector
CD-IN: CD-audio connector
MODEM-CN: Mono in (Pin 1-2) and Mic out (Pin 3-4)
WOM: Wake On Modem connector
WOL: Wake On LAN connector
2-3
Hardware Installation
2.2 Jumpers
With the help of VID signal and SMbus, this motherboard is jumper-less design.
2.2.1 Selecting the CPU Frequency
VID signal and SMbus clock generator provide CPU voltage auto-detection
and allow user to set CPU frequency through CMOS setup, no jumper or
switch is needed. The correct CPU information is saved into EEPROM, with
these technologies, the disadvantages of Pentium base jumper-less design
are eliminated. There will be no worry of wrong CPU voltage detection and no
need to re-open the housing if CMOS battery loss.
The CPU frequency selection is set by going into:
BOIS Setup Æ Chipset Features Setup Æ CPU Clock Frequency
(The possible setting is 66.8, 68.5, 75, 83.3 MHz)
BOIS Setup Æ Chipset Features Setup Æ CPU Clock Ratio
(The possible setting is 1.5x, 2x, 2.5x, 3x, 3.5x, 4x, 4.5x, 5x, 5.5x, 6x, 6.5x, 7x,
7.5x, and 8x)
Core frequency = Ratio * External bus clock
INTEL Celeron PPGA CPU Core Frequency Ratio External Bus Clock
Celeron PPGA 366 366MHz= 5.5x 66MHz
Celeron PPGA 400 400MHz= 6x 66MHz
Celeron PPGA 433 433MHz= 6.5x 66MHz
Warning: INTEL 440LX chipset supports maximum 66MHz
external CPU bus clock, the higher clock settings are for internal
test only. These settings exceed the specification of LX
chipset, which may cause serious system damage.
2-4
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